Slim fan does a louder noise during game play

Yeah this has happened only recently last week. While I was playing a game Installed or in disk the fan speed would get louder while I was on the gameplay.

Happens when I switch to game menu to gameplay and sometimes randomly in gameplay.

Someone else has also had same problem as i had

http://forums.xbox.com/35086555/ShowPost.aspx#35086555

Very obvious solution here, Obviously the system is gonna get hotter when your running a game because it practically takes all the machines power so the fans go faster to keep it at optimal heat. Is the system and fan well ventilated?

Yep.

But when i first got it it never did it before. only recently its been doing it.

The loud fan of DOOM!!!! When you hear it you know your systems on it's last leg.

It happened to me when I installed a Kinect game lol. I'm going to uninstall it and see what happens later on but the louder noise doesn't bother me though.